Answer:
m1u1+m2u2=(m1+m2)V
400kgm/s=400kgm/s
Explanation:
A 120 kg lineman moving west at 2 m/s tackles an 80 kg football fullback moving east at 8 m/s. After the collision both players move east at 2 m/s.
the principle of linear ,momentum states that the total momentum before collision must be equal to the total momentum after collision.
m1u1+m2u2= before collision
m1=mass of the line man
u1=speed of the lineman
m2=mass of te full back
u2=speed of te full back
V=common velocity after the collision
we designate the east direction as negative
and designate the east direction as positive
-120*2+80*8
400kgm/s
momentum after collision
(m1+m2)V
120+80)2
400kgm/s
therefore 400kgm=400kgm/s
this satisfy the principle of linear momentum
